External Power Point, Can I use it (With an adapter of some sort)

[lego]

Basically, I have acquired a few parking spaces in a supermarket car park for a few days to do some promotions.

This is located near an external power socket which I am able to use.

shown here

Would I be able to use this and get an adapter to change it to a standard plug type connector?

 

[lego]

Ok thanks, guys I already have some of the Round connectors and cables knocking about. Would It be safe to Cut the cable and just wire in the standard connector myself?

 

[lego]

Cheers